题解 | #自守数#
自守数
https://www.nowcoder.com/practice/88ddd31618f04514ae3a689e83f3ab8e
const rl = require("readline").createInterface({ input: process.stdin }); var iter = rl[Symbol.asyncIterator](); const readline = async () => (await iter.next()).value; void async function () { while(line = await readline()){ let num = Number(line); let count = 0; for(let i=0; i<=num;i++){ if(isSelf(i)){ count ++; } } console.log(count); } //判断是否是自守数的方法 function isSelf(n){ let s = n.toString(); let ss = (n*n).toString(); if(ss.endsWith(s)) return true; return false; } }()